Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5564499 | Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures | Roger Bartlett WILLIS, Phillip M. Halleck | 1996-10-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5564499 | Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures | Roger Bartlett WILLIS, Phillip M. Halleck | 1996-10-15 |